<script setup>
import CenterCom from '@/components/center-com.vue'
import { ref, provide } from 'vue'

// 1.跨层传递普通数据
provide('theme-color', 'pink')
// 2.传递响应式数据
const count = ref(100)
provide('count', count)
setTimeout(() => {
  count.value = 500
},2000)

// 3. 跨层传递函数，给子孙后代传递可以修改数据的处理函数
provide('changeCount', (newCount) => {
  count.value = newCount
})

</script>


<template>
    <div>
      <h1>我是顶层组件</h1>
      <CenterCom></CenterCom>
    </div>
</template>